donovan



A. J. DONOVAN AND F. POKORNY, In. APPARATUS FOR THE ATOMIZATION 0F mumFUEL.

APPLICATION FILED AUG.5.192'2- Reissued NOV- 21, 19 22 I .5,494:.

Reissued Nov. 21, 1922.

UNITED ST A T E S PATENT OFFICE.

ARTHUR J. DONOVAN, OF ARDSLEY, AND FRANK POKORNY, J'R., OF MAMARONECK,NEW YORK, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, 0F ONE-HALF 'IOSAID POKORNY AND ONE I-IALF TO FRANCIS W. KEEGAN, BOTH OI NE'W YORK, N.Y.

APPARATUS FOR ATOMIZATION OF LIQUID F'U'IllL.

Original No. 1,290,523, dated January 7, 1919, Serial No. 229,909, filedApril 22, 1918. Application for reissue filed August 5, 1922. Serial No;579,954.

To all to 7mm it may concern:

Be it known that we, ARTHUR J. DoNovAN and FRANK POKORNY, Jr., citizensof the United States, and residents, respectively, of Ardsley, in thecounty of Vestchester, and Mamaroneck, in the county of Vestchester,both in the State of New York, have invented certain new and usefulImprovements in Apparatus for the Atomization of Liquid Fuel, of whichthe following is a clear and exact specification, reference being had tothe accompanying drawing,'which forms a part of this application.

This invention relates to an apparatus for atomizing liquid fuel, andour present application, which is Division C of our appli cation forReissue Patent, Ser. No. 378,25a filed May 1, 1920, and is directed tomeans for effecting the impingement of separate streams of fuel mixtureupon each other, so that the fuel particles may be finely divided by theforce of impaction thus provided, and whereby, in the confluence of thetwo streams thus provided, there may be set up a state of intermixturebetween. the air and fuel most suitable for combustion.

In the example of apparatus herein illustrated for performing thepurpose of our invention we have shown the same structure as thatcomprised in our co-pending reissue application, previously referred to,which is in theform of a governor, and includes a passage connecting anengine intake 1 with a carbureter 2.

This divisional application is not concerned primarily with the fuelmixture governing features of the structure represented in the drawing,and they will not therefore be described herein.

Those elements of the indicated structure which co-operate to'performthe functions of this application include a piston element,which serves as a supply throttle and consists of an annulus 16, havinga radial flange 17 at its lower portion, the periphery of said flangebeing slidable against the inner surface of portion 4 of the connectingpassage,

' in the movement of said annulus, whose outer surface rides against theinner surface of a concentric member 18, in the functioning of saidpiston element. I

Thus a chamber 19 is bounded by the annulus 16, its flange 17, theportion 4 and the under surface of member 18; said chamber tion of thechamber 19 under the aspiratory force of the motor, thus renderingsaidannulus responsive in movement to that influence. upon a base, as21, which may form part of a choke device, here shown as a Venturi tube22, connected, as by radial arms 23, with a threaded portion 24, screwedinto portion i. When the annulus is seated, as stated, the spacesbetween the arms 23 are thereby covered and fuel mixture can then onlybe drawn through the venturi, flowing thus in restricted quantity, asfor motor idling pur poses; but when the annulus has been lifted up,then additional fuel passageis available through the spaces between thearms 23, and between the outer surface of the Venturi tube and the undersurface of the annulus 16, the extent and capacity of the passagevarying according to the degree to which the annulus is raised.

With the lift of supply throttle 16 fuel mixture is caused to flowbetween the inclined surface 25 of said supply throttle and the outerwall of the venturi, this fluid flow being accorded a convergentdirection by the inward and upward angle of'said inclined surface 25, sothat in fact the volume of fluid enters the passage in conoidal form.Since at the same time fuel mixture is also flowing, under the samesuction influence created by the engine in its aspiratory operation,through the axial orifice of the venturi, it follows that the twoseparate volumes of fluid admitted to the passage enter into impingingrelation which results in a fuel pulverizing action, whereby the fuelparticles in each volume become more finely subdivided and all areintimately intermingled in and dispersed throughout the combined volumesto constitute a highly combustible mixture. Also, due to the outwardlyflared form of the venturi exit, the central stream of fluid mixtureissuing therefrom tends to spread or diverge toward the other orconvergent fuel mixture flow, which has the effect of intensifying theforce of impact between the two volumes of fluid, thereby enhancing thevalue of the bombardment be- Normally the annulus 16 is seated.

tween the fluid streams in their fuel pulverizing and mixture makingcharacteristics.

Variations Within the spirit and scope of our invention are equallyeomprehended'by the foregoing disclosure. We claim;- I v 1; In fuelmixture supply means for in ternal combustion engines, in combination,means permitting a central flow of fuel mixture, (and means permitting aconcentric, variable flow of fuel mixture, said flow permitting meanscausing the separate flows of fuel mixture to enter into impingingrelation with one another;

2. In fuel mixture supply means for internal combustion engines, theprovision of separate means for causing the fuel mixture to flow indifferent streams, one of said ternal combustion engines, the provisionof separate means for causing the fuel mixture to flow in different,concentric streams, one of said streams having variable flow, saidseparate means also being arranged to direct the different streams intoimpinging relation with one another for coi'nmingling purposes.

Signed at White Plains, in the county of Vvestchester ancl;Statc of NewYork, this 29th day of July, 1922.

ARTHUR J. DONOVAN. FRANK roKoRNY, JR.

